Novel constructed wetland operation mode and system

Abstract

The invention relates to a novel constructed wetland operation mode and system, wherein the method comprises the following steps: (1) carrying out filtration treatment on sewage to remove suspended particles in water; (2) carrying out aeration treatment on the filtered sewage; (3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, providing a light source to ensure full growth of algae, and absorbing nitrogen and phosphorus in the sewage; (4) regularly harvesting algae and aquatic plants in the algae reaction pond, and mixing the harvested algae and aquatic plants with bait to be recycled as feed; and (5) disinfecting and sterilizing effluent in the algae reaction pond. By utilizing the characteristic that algae plants need a large amount of nutrient elements, algae products with relatively high value are produced while sewage is purified, so that the water treatment cost can be reduced, the production by-products can be increased, the resource utilization of the nutrient elements in sewage treatment is realized, and the method is an ideal water treatment mode.

Description

technical field [0001] The invention relates to the field of sewage treatment, and specifically relates to a new operating mode and system for constructed wetlands. Background technique [0002] Traditional sewage treatment processes regard nitrogen and phosphorus as polluting elements. In order to remove ammonia nitrogen in sewage, in the traditional sewage biochemical treatment process, the principle of nitrification and denitrification is used to convert the nutrient element ammonia nitrogen in water into useless nitrogen release. 3 -N), a large amount of organic matter such as methanol and glucose had to be artificially added; and in order to remove phosphorus, the residue containing a large amount of phosphorus was transferred from the sewage to the excess sludge by means of sludge discharge. The main disposal method of excess sludge ( incineration, landfill, etc.). This treatment method fails to utilize or eliminate these nutrients; fundamentally, it still cannot eli...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a new type of artificial wetland operation mode and system to solve the problem in the prior art that the decomposition rate of nitrogen and phosphorus in algae treatment sewage cannot be guaranteed

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